I am new to raising chickens. I bought some RIR from TSC recently on two separate occasions. I bought two that were supposedly pullets (I believe they are Roos from all I have read). Then after researching went back and bought six more and asked if I could pick out my own. Lol! Question is...the first two are about 5 weeks old and have lots of white feathers...but the breast feathers are red... The others are just a week old but their wing and tail feathers are obviously "red". Why the difference. Both bought as RIR!??